Calendar



" J. J. sow

QALENDAR Filed Jan. f7, 1941 Mayv 19, 1942 latentecl May` 19, 1942 .CALENDAR y .l ung Jin Sow, Vancouver, British Columbia, Canada Application January 7, 1941, Serial No. 373,446

1 Claim.

My invention relates to improvements in calendars of the so-called perpetual type, the objects of which are to provide a calendar capable of being conveniently applied to a cylindrical body such as a pencil and so manipulated that any month of any year throughout a century may be displayed at will and within a moment or two and without calculation of any kind.

The invention consists essentially of a cylindrical body surrounded by sleeves, two of which are rotatable to dispose the sequence of day numbers of a desired month of a desired year in juxtaposition with the days of the week, as will be more fully described in the following specification and shown in the accompanying drawing, in which:

Fig. 1 is a projected view of the charts or tables used in making up the primary sleeve.

Fig. 2 is a projected view of the charts or tables used for the rotating sleeves.

Fig. 3 is a general view part in section showing the preferred type of calendar applied to a pencil.

Fig. 4 is a general view part in section showing a modification.

In the drawing like characters of reference indicate corresponding parts in each ligure.

The numeral I indicates a sheet of numbers in which 2 indicates vertical rows of numbers representing the years of a century from zero or to 99, those of which are representative of a leap year are preferably of a diiferent colour to the remainder and are indicated in all the figures as being within a circle as at 3. The lower columns of gures, indicated by the numeral 4 indicate index numbers which are used to indicate theday under which the rst day of any desired month is to be set to give a calendar for that month. Certain of these index numbers, viz. those of the rst and third line are for use in leap years and are therefore also enclosed within circles for identification.

The charts represented in Figure 1 are secured upon the surface of a pencil indicated by the numeral 5. The charts shown in Figure 2 consists of a sheet 6 and is divided into separate portions, viz. an upper part 1, an intermediate part 8 and a lower part 9. The upper part 1 is provided with a vertical slot I0 which is adapted to expose any desired vertical column of numbers I and 4 displayed on the fixed sheet I. The slot I0 is bordered at its upper end-with the century number, in this case I9 as at I2 and the word year which is to be co-related with any year number on the sheet I. The lower part of the slot I0 is bordered on one side with abbreviations of the months of any common year as at I4 and the months of January and February of any leap year as at I5, which'latter are also specifically marked L. Y. .The lower part of the slot is bordered on its right side with the number of days in the month shown in the same horizontal line.

The intermediate part 8 is divided intoseven vertical columns, each consisting of a number indicated by the numeral I6 asfrom I to 1 and an abbreviation indicated by the numeral I1 of a day of the week.

The lower part 9 is divided into seven columns of numbers indicated by the numeral I8 representing the dates of any desired month.

In the embodiment shown in Figure 3 the intermediate part 8 of the sheet 6 is mounted as a rotatable band 2IJ on the pencil and the upper and lower parts 1 and 9 will be non-rotatable.

The sheet I is provided with a knurled collar 2I so that it can be rotated within the uppe sheet part 1.

In the modification, the lower part 9 is formed into a band 22 and is fitted with a knurled collar 23 by which the band may be turned.

The device as shown in Figure 3 is operated in the following manner:

Assuming that it is desired to find what day March 29, 1934, was. The collar 2l is turned until the number 34v in one of the vertical rows 2 on sheet I is brought into the upper part of the slot I0, we get a reading showing the year 1934, next we look for the month I4 against whichV we now nd the index number 4. Now by turning the band 20 until the column made up of the number 4 and the abbreviation Thu. is directly under the slot, when we have a calendar for the month of March of that year which shows 29th to be Thursday This month calendar will be correct for February of any common year, March or November of any year in which -the year numbers 2 are displayed in the slot as 1945, 1951, 1956 etc.

Assuming a desire to find the day which is November 10th, 1940 on the modified form of the invention shown in Figure 4. The year is found as above described and so is the index number for November found in the slot I0 which index number is 5. In this case we turn the lower part 9 of the sheet I or the band 2,3 until the first day number I is below the figure 5 of the intermediate part 8, which gives the com-r plete month of November and shows that its rst day is Friday and that the 10th was Sunday.'

.It Will be noted that the same final result is Y' obtained in both modifications and it is merely a matter of choice as to whether the intermediate part.8 or the lower part 9 is made to move.

What I claim as my invention is:

A calendar comprising a body, a vertically slotted cylindrical member non-rotatably secured to and spaced from the body, a sleeve rotatable about the body and within the slotted cylindrical member, the vertically slotted cylindrical member being of a length corresponding to the length of the rotatable sleeve, a second sleeve below the rotatable sleeve and a third sleeve below the second sleeve said second and third sleeves being unslotted, one of said second and third sleeves being rotatable about the body, said cylindrical member having indicia indicaofthe third sleeve being adapted to be brought into proper register to show the date and day of any month.

. JUNG JIN SOW. 

